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Climate Lab — St. Catharines, Canada

Climate Lab·

Monthly climate metrics across temperature, precipitation, wind, and UV.

MetricJanFebMarAprMayJunJulAugSepOctNovDecYear
Temperature
Daily high°C
3
5
9
12
19
24
26
26
23
19
13
7
15
Daily mean°C
1
0
4
8
12
20
23
23
19
12
6
2
11
Daily low°C
-5
-7
-1
2
7
15
20
20
16
8
1
-3
6
Thermal comfort
High feels°C
2
2
12
18
26
29
31
31
28
21
12
3
18
Mean feels°C
-10
-10
-1
7
17
23
27
25
19
7
0
-8
8
Low feels°C
-20
-23
-16
-8
3
14
19
18
10
-1
-12
-17
-3
Humidity
Humidity%
75
70
70
70
68
71
73
76
75
74
71
76
72
Dewpoint°C
-3.4
-4.2
-1.7
2.5
5.9
13.9
18.2
17.9
13.9
7.4
1.1
-2.5
5.8
Precipitation
Rainfallmm
79
28
65
80
65
78
91
73
69
81
65
81
855
Rain days≥1mm
8
5
11
14
10
10
11
12
8
11
11
11
122
Snowfallmm
25
53
12
0
0
0
0
0
0
0
1
13
104
Snow days≥1mm
6
7
3
0
0
0
0
0
0
0
0
3
19
Wind
Wind avgm/s
4.4
5.0
4.5
4.0
3.1
3.2
2.9
3.1
3.3
4.4
5.0
4.7
4.0
Windiest hoursm/s
8.2
10.0
9.1
8.1
6.8
7.0
6.0
6.7
6.3
8.1
8.7
9.9
7.9
Sun & UV
Sunshinehrs/day
4.0
7.2
7.9
8.9
11.3
11.9
11.7
11.0
9.2
6.9
6.0
4.0
8.3
Clear skyindex
16%
29%
37%
42%
42%
56%
56%
52%
47%
41%
36%
21%
40%
UV indexmax avg
0.9
1.7
3.1
4.0
6.0
6.8
7.1
6.1
4.7
2.6
1.3
0.8
3.8
Based on 2014–2024 hourly climate data · Updated Mar 2025
Confidence: High

How winter feel compares

Compared across Canada

St. Catharines: -17.2 °C. Typical range in Canada: -23.1–-17.3 °C. Low anchor: Saskatoon, -33.2 °C. High anchor: Vancouver, -4.9 °C.

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